Seiko Cal. 6321 - 821

The 6321-821 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6321 caliber with 31j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-bf3ba9c1f69b]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1969

Related Models

• Seiko 4566-883
• Seiko 3826-622
• Seiko 6315-504
• Seiko 6685-321
• Seiko 6263-729
• Seiko 6285-907
• Seiko 6240-841
• Seiko 6663-539
• Seiko 6255-122
• Seiko 6144-391
• Seiko 4431-915
• Seiko 7025-652